MEDIUM
9th CBSE
IMPORTANT
Earn 100

The atomic mass of uranium is 238. How many times is the atom of uranium heavier than the carbon atom?

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 4
Which of the following oxides of nitrogen has the largest molecular mass: NO, N2O, NO2, N2O4, N2O5?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 5
How many moles are there in 10 g of calcium?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 6
What is the mass in gram of 4 moles of nitrogen atom?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 7
Calculate the number of iron atoms in a piece of iron weighing 8.4 g.
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 8
Which of the following contains a greater number of atoms: a. 60 g Fe b. 60 g Al?( Atomic mass of Fe=56 u, atomic mass of Al=26.9 u)
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 9

Calculate the mass in gram of one atom of carbon.

HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 10
How many grams of neon has the same number of atoms as 8 g of calcium?
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 11
The mass of 1 atom of an element A is 5.3×10-23g. What is its atomic mass? Give the symbol of this element.